Her behaviour has been increasingly erratic and now Amanda Bynes has gone on a Twitter rant against an unnamed ex.

The Easy A star wrote on the social network site: 'When you write me on twitter and I ignore you it’s because I plan on ignoring you on twitter and in life forever.'

Yesterday she had written: 'If I’m not following you on twitter Quit acting like you know me,' 'I want to be the only one you adore' and also 'If you were hot, I’d be so into you. Dedicated to my exes still tryna holla.'

More trouble: Amanda Bynes has vented her spleen at an unidentified ex on Twitter in an incoherent, cryptic style

The star's bizarre behavior has her loved ones deeply concerned.

Bynes' worried family is trying to get her to leave New York and move closer to them in Los Angeles.

But the troubled 26-year-old actress is reportedly refusing to move back to the West Coast to allow them to keep a closer eye on her.

Step away from the phone: Bynes has been Tweeting strange messages again

What's she on about? Amanda Tweeted these oblique messages

Amanda was recently forced to move out of her New York apartment after being threatened with eviction.

A source close to the family told E! Newsthat the What I Like About You actress has everyone extremely worried about her strange behaviour of late, including her raunchy tweets to Drake.

Her family is still hopeful that Amanda will return to her normal self but will step in to help get her life back on track if necessary.

As she was: Amanda was in a healthier place as she posed with sister Jillian and mother Lynn at the Young Hollywood Awards in 2006

Amanda has had a series of legal troubles in the past few months.

In December Amanda settled two hit-and-run cases after reaching a civil compromise with her victims, saving herself from a potential 12 months in jail.

Along with her legal troubles, Amanda was involved in two bizarre episodes in September 2011.

They included locking herself in a store changing room for nearly two hours and refusing to come out, and stripping off during a gym class.

Friends say her parents don't know what to do as Amanda has cut contact with everyone.

Changing appearance: The Easy A star has pierced her cheeks and gotten at least one tattoo as her behaviour continues to get more bizarre

'Amanda shut them out and isn't speaking to them,' the source explained. 'She is doing everything on her own. She has no direction.

'Amanda is out of control. She won't accept help from anybody.... She's completely lost.'

Amanda left her Twitter followers shocked after posting a crude, sexually charged tweet about rapper Drake on Thursday.

The former Nickelodeon star, who has been going off the rails of late, wrote: 'I want @drake to murder my vagina.'

Crude: The troubled actress made a sexually charged comment to rapper Drake, who she has also described as a 'hot fellow'

Her potty-mouthed remark comes on top of a series of Twitter rambling she has made about the 26-year-old Canadian star.

Last week she described him as a 'hot fellow' on the social networking site and began posting a series of photos of him.

But her latest tweet certainly provoked a reaction from her fans.

One Twitter user commented: 'She's gone crazy,' while another surmised: 'She has to be hacked or [something].'

Making a pass: Amanda, seen right at the MTV Movie Awards in June 2011, has been going on a downward spiral of late

Other followers noted how much the actress has changed since her days as a sweet and innocent child star on Nickelodeon show All That.

Bynes - who has both her cheeks pierced with jewellery - announced in 2007 that she did not want to become yet another wild Hollywood star.

Amanda shot to fame after appeared in successful television series including as All That and The Amanda Show on Nickelodeon in the mid to late 1990s and early 2000s.

She also branched out into film, appearing in the likes of 2003's critically panned What A Girl Wants and 2007's Hairspray before her abrupt retirement.